Perceptual Allowances of Anamorphic Interaction Cues in Spatial Augmented Reality

Abstract

Spatial Augmented Reality (SAR) enables the projection of digital content directly on the physical environment without the use of wearable displays. In spaces where viewers are encouraged to explore different locations, perspective anamorphosis techniques can be used to guide them through the physical environment. We propose a design space for describing anamorphic SAR interaction cues based on the continuity of the image when projected onto the environment, and the need for movement in order to understand the cue. We conduct two perceptual studies using virtual reality (VR) to simulate a SAR environment, to explore how well viewers identify ocular points on various surface geometries. We also present a system approach and experiment design for a future study to compare participants' ability to find the ocular point in a VR setting versus a SAR setting. This work can enable designers to create anamorphic content that takes advantage of the geometry in their physical space.